Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Strain Hardening Behavior in the Tube Hydroforming

튜브 액압성형품의 가공 경화 특성 연구

  • 박현규 (부산대학교 기계공학부) ;
  • 임홍섭 (부산대학교 기계공학부) ;
  • 이해경 (부산대학교 기계공학부) ;
  • 김광순 (현대하이스코 기술연구소) ;
  • 문영훈 (부산대학교 기계공학부)
  • Published : 2008.12.01
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Abstract

Strain hardening behavior during hydroforming has been experimentally investigated. The variation of flow stress was used as an index of strain hardening during respective processes and the flow stress was estimated from the correlationship between flow stress and effective strain. The local hardness after hydroformig was also predicted by effective strain. By using the inter-relationships between hardness-flow stress-effective strain at variable pre-strains, the strain hardening behavior during hydroforming has been successfully analyzed. The comparison of predicted hardness with measured hardness confirmed that the methodology used in this study was feasible and the strain hardening behavior can be quantitatively estimated.

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References

  1. B. S. Levy, C. J. Van Tyne, J. M. Stringfield, 2004, Characterizing steel tube for hydroforming applications, Journal of Materials Processing Technology, Vol. 150, pp. 280-289 https://doi.org/10.1016/j.jmatprotec.2004.03.008
  2. Jae-bong Yang, Byung-hee Jeon, Soo-Ik Oh, 2001, tube bending technology of a hydroforming process for an automotive part, Jaurnal of Materials Processing Technology, Vol. 111, pp. 175-181 https://doi.org/10.1016/S0924-0136(01)00505-2
  3. F. Dohmann, Ch. Hartl, 1977, Tube hydroforming - research and practical application, Journal of Materials Processing Technology, Vol. 71, pp. 174-186 https://doi.org/10.1016/S0924-0136(97)00166-0
  4. Jae-Heon Park, Yi-Chon Choi, Kyung-Gi Kim, 2003, A Study on the Formability of Engine Cradle applied to Hydroforming according to Material Properties, Proceedings of the Korean Society for Technology of Plasticity Conference Vol. 03, pp. 249-253
  5. Chung-seog Oh, Soon-Gue Kwon, Byung-Ik Choi, 2007, The variations of tensile and fatigue propertise in the Hydroforming Process, Journal of the Korean Society for Precision Engineering, Vol. 24, pp. 111-117
  6. Mike Jansson, Larsgunnar Nilsson, Kjell Simonsson, 2008, On strain localization in tube hydroforming of aluminium extrusions, Journal of Materials Processing Technology, Vol. 195, pp. 3-14 https://doi.org/10.1016/j.jmatprotec.2007.05.040
  7. Kristoffer Trana, 2002, Finite element simulation of the tube hydroforming process-bending, performing and hydroforming, Journal of Materials Processing Technology, Vol. 127, pp. 401-408 https://doi.org/10.1016/S0924-0136(02)00432-6
  8. D. Daly, P. Duroux, M. Rachik, J. M. Roelandt, J. Wilsius, 2007 Modeling of the post-localization behaviour in Tube hydroforming of low carbon steels, Journal of Materials Processing Technology, Vol. 182, pp. 248-256 https://doi.org/10.1016/j.jmatprotec.2006.08.006
  9. Heon Young Kim, Hee Taek Lim, Hyung Jong Kim, Dong Jae Lee, 2007, The Effective of Prebending on the Formability in the Tube Hydroforming Process of an Aluminum Rear Subframe, Metal and Materials International, Vol.13, pp. 87-92 https://doi.org/10.1007/BF03027557
  10. Soo-Ik Oh, Byung-Hee Jeon, Hyun-Yong Kim, Jae-bong Yang, 2006, Applications of hydroforming process to automobile parts, Jaurnal of Materials Processing Technology, Vol. 174, Issues 1-3, May 25, pp. 42-55 https://doi.org/10.1016/j.jmatprotec.2004.12.013